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      1 /*
      2  * Copyright (C) 2017 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 #define LOG_TAG "VintfObject"
     18 //#define LOG_NDEBUG 0
     19 #include <android-base/logging.h>
     20 
     21 #include <vector>
     22 #include <string>
     23 
     24 #include <nativehelper/JNIHelp.h>
     25 #include <vintf/VintfObject.h>
     26 #include <vintf/parse_string.h>
     27 #include <vintf/parse_xml.h>
     28 
     29 #include "core_jni_helpers.h"
     30 
     31 static jclass gString;
     32 static jclass gHashMapClazz;
     33 static jmethodID gHashMapInit;
     34 static jmethodID gHashMapPut;
     35 static jclass gLongClazz;
     36 static jmethodID gLongValueOf;
     37 
     38 namespace android {
     39 
     40 using vintf::HalManifest;
     41 using vintf::Level;
     42 using vintf::SchemaType;
     43 using vintf::VintfObject;
     44 using vintf::XmlConverter;
     45 using vintf::Vndk;
     46 using vintf::gHalManifestConverter;
     47 using vintf::gCompatibilityMatrixConverter;
     48 using vintf::to_string;
     49 
     50 template<typename V>
     51 static inline jobjectArray toJavaStringArray(JNIEnv* env, const V& v) {
     52     size_t i;
     53     typename V::const_iterator it;
     54     jobjectArray ret = env->NewObjectArray(v.size(), gString, NULL /* init element */);
     55     for (i = 0, it = v.begin(); it != v.end(); ++i, ++it) {
     56         env->SetObjectArrayElement(ret, i, env->NewStringUTF(it->c_str()));
     57     }
     58     return ret;
     59 }
     60 
     61 template<typename T>
     62 static void tryAddSchema(const std::shared_ptr<const T>& object, const XmlConverter<T>& converter,
     63         const std::string& description,
     64         std::vector<std::string>* cStrings) {
     65     if (object == nullptr) {
     66         LOG(WARNING) << __FUNCTION__ << "Cannot get " << description;
     67     } else {
     68         cStrings->push_back(converter(*object));
     69     }
     70 }
     71 
     72 static void tryAddHalNamesAndVersions(const std::shared_ptr<const HalManifest>& manifest,
     73         const std::string& description,
     74         std::set<std::string> *output) {
     75     if (manifest == nullptr) {
     76         LOG(WARNING) << __FUNCTION__ << "Cannot get " << description;
     77     } else {
     78         auto names = manifest->getHalNamesAndVersions();
     79         output->insert(names.begin(), names.end());
     80     }
     81 }
     82 
     83 static jobjectArray android_os_VintfObject_report(JNIEnv* env, jclass)
     84 {
     85     std::vector<std::string> cStrings;
     86 
     87     tryAddSchema(VintfObject::GetDeviceHalManifest(), gHalManifestConverter,
     88             "device manifest", &cStrings);
     89     tryAddSchema(VintfObject::GetFrameworkHalManifest(), gHalManifestConverter,
     90             "framework manifest", &cStrings);
     91     tryAddSchema(VintfObject::GetDeviceCompatibilityMatrix(), gCompatibilityMatrixConverter,
     92             "device compatibility matrix", &cStrings);
     93     tryAddSchema(VintfObject::GetFrameworkCompatibilityMatrix(), gCompatibilityMatrixConverter,
     94             "framework compatibility matrix", &cStrings);
     95 
     96     return toJavaStringArray(env, cStrings);
     97 }
     98 
     99 static jint verify(JNIEnv* env, jobjectArray packageInfo, android::vintf::DisabledChecks checks) {
    100     std::vector<std::string> cPackageInfo;
    101     if (packageInfo) {
    102         size_t count = env->GetArrayLength(packageInfo);
    103         cPackageInfo.resize(count);
    104         for (size_t i = 0; i < count; ++i) {
    105             jstring element = (jstring)env->GetObjectArrayElement(packageInfo, i);
    106             const char *cString = env->GetStringUTFChars(element, NULL /* isCopy */);
    107             cPackageInfo[i] = cString;
    108             env->ReleaseStringUTFChars(element, cString);
    109         }
    110     }
    111     std::string error;
    112     int32_t status = VintfObject::CheckCompatibility(cPackageInfo, &error, checks);
    113     if (status)
    114         LOG(WARNING) << "VintfObject.verify() returns " << status << ": " << error;
    115     return status;
    116 }
    117 
    118 static jint android_os_VintfObject_verify(JNIEnv* env, jclass, jobjectArray packageInfo) {
    119     return verify(env, packageInfo, ::android::vintf::ENABLE_ALL_CHECKS);
    120 }
    121 
    122 static jint android_os_VintfObject_verifyWithoutAvb(JNIEnv* env, jclass) {
    123     return verify(env, nullptr, ::android::vintf::DISABLE_AVB_CHECK);
    124 }
    125 
    126 static jobjectArray android_os_VintfObject_getHalNamesAndVersions(JNIEnv* env, jclass) {
    127     std::set<std::string> halNames;
    128     tryAddHalNamesAndVersions(VintfObject::GetDeviceHalManifest(),
    129             "device manifest", &halNames);
    130     tryAddHalNamesAndVersions(VintfObject::GetFrameworkHalManifest(),
    131             "framework manifest", &halNames);
    132     return toJavaStringArray(env, halNames);
    133 }
    134 
    135 static jstring android_os_VintfObject_getSepolicyVersion(JNIEnv* env, jclass) {
    136     std::shared_ptr<const HalManifest> manifest = VintfObject::GetDeviceHalManifest();
    137     if (manifest == nullptr || manifest->type() != SchemaType::DEVICE) {
    138         LOG(WARNING) << __FUNCTION__ << "Cannot get device manifest";
    139         return nullptr;
    140     }
    141     std::string cString = to_string(manifest->sepolicyVersion());
    142     return env->NewStringUTF(cString.c_str());
    143 }
    144 
    145 static jobject android_os_VintfObject_getVndkSnapshots(JNIEnv* env, jclass) {
    146     std::shared_ptr<const HalManifest> manifest = VintfObject::GetFrameworkHalManifest();
    147     if (manifest == nullptr || manifest->type() != SchemaType::FRAMEWORK) {
    148         LOG(WARNING) << __FUNCTION__ << "Cannot get framework manifest";
    149         return nullptr;
    150     }
    151     jobject jMap = env->NewObject(gHashMapClazz, gHashMapInit);
    152     for (const auto &vndk : manifest->vendorNdks()) {
    153         std::string key = vndk.version();
    154         env->CallObjectMethod(jMap, gHashMapPut,
    155                 env->NewStringUTF(key.c_str()), toJavaStringArray(env, vndk.libraries()));
    156     }
    157     return jMap;
    158 }
    159 
    160 static jobject android_os_VintfObject_getTargetFrameworkCompatibilityMatrixVersion(JNIEnv* env, jclass) {
    161     std::shared_ptr<const HalManifest> manifest = VintfObject::GetDeviceHalManifest();
    162     if (manifest == nullptr || manifest->level() == Level::UNSPECIFIED) {
    163         return nullptr;
    164     }
    165     return env->CallStaticObjectMethod(gLongClazz, gLongValueOf, static_cast<jlong>(manifest->level()));
    166 }
    167 
    168 // ----------------------------------------------------------------------------
    169 
    170 static const JNINativeMethod gVintfObjectMethods[] = {
    171     {"report", "()[Ljava/lang/String;", (void*)android_os_VintfObject_report},
    172     {"verify", "([Ljava/lang/String;)I", (void*)android_os_VintfObject_verify},
    173     {"verifyWithoutAvb", "()I", (void*)android_os_VintfObject_verifyWithoutAvb},
    174     {"getHalNamesAndVersions", "()[Ljava/lang/String;", (void*)android_os_VintfObject_getHalNamesAndVersions},
    175     {"getSepolicyVersion", "()Ljava/lang/String;", (void*)android_os_VintfObject_getSepolicyVersion},
    176     {"getVndkSnapshots", "()Ljava/util/Map;", (void*)android_os_VintfObject_getVndkSnapshots},
    177     {"getTargetFrameworkCompatibilityMatrixVersion", "()Ljava/lang/Long;", (void*)android_os_VintfObject_getTargetFrameworkCompatibilityMatrixVersion},
    178 };
    179 
    180 const char* const kVintfObjectPathName = "android/os/VintfObject";
    181 
    182 int register_android_os_VintfObject(JNIEnv* env)
    183 {
    184 
    185     gString = MakeGlobalRefOrDie(env, FindClassOrDie(env, "java/lang/String"));
    186     gHashMapClazz = MakeGlobalRefOrDie(env, FindClassOrDie(env, "java/util/HashMap"));
    187     gHashMapInit = GetMethodIDOrDie(env, gHashMapClazz, "<init>", "()V");
    188     gHashMapPut = GetMethodIDOrDie(env, gHashMapClazz,
    189             "put", "(Ljava/lang/Object;Ljava/lang/Object;)Ljava/lang/Object;");
    190     gLongClazz = MakeGlobalRefOrDie(env, FindClassOrDie(env, "java/lang/Long"));
    191     gLongValueOf = GetStaticMethodIDOrDie(env, gLongClazz, "valueOf", "(J)Ljava/lang/Long;");
    192 
    193     return RegisterMethodsOrDie(env, kVintfObjectPathName, gVintfObjectMethods,
    194             NELEM(gVintfObjectMethods));
    195 }
    196 
    197 };
    198